Product Info
MORLAB
Shenzhen Morlab Communications Technology Co., Ltd.
FL1-3, Building A, FeiYang Science Park, No.8 LongChang Road,
Block67, BaoAn District, ShenZhen , GuangDong Province, P. R. China
Tel: 86-755-36698555 Fax: 86-755-36698525
Http://www.morlab.cn E-mail: service@morlab.cn
REPORT No.：SZ21070039S02
Page 17 of 53
exciting field is pulsed, the crest factor of the signal must be known to correctly compensate for
peak power.
The formula for each channel can be given as:
V
U
U
cf
dcp
With Vi = compensated signal of channel i, (i = x, y, z)
Ui = input signal of channel i, (i = x, y, z)
cf = crest factor of exciting field (DASY parameter)
dcpi = diode compression point (DASY parameter)
From the compensated input signals, the primary field data for each channel can be evaluated:
E-field Probes:E
H-field Probes:H
V
With V
i
= compensated signal of channel i, (i = x, y, z)
Norm
i
= sensor sensitivity of channel i, (i = x, y, z), μV/(V/m)
2
forE-field
Probes ConvF = sensitivity enhancement in solution
a
ij
= sensor sensitivity factors for H-field probes
f = carrier frequency [GHz]
E
i
= electric field strength of channel i in V/m
H
i
= magnetic field strength of channel i in A/m
The RSS value of the field components gives the total field strength (Hermitian magnitude):
E
E
E
E
The primary field data are used to calculate the derived field units.
SAR E
σ
ρ1000
with SAR = local specific absorption rate in mW/g
E
tot
= total field strength in V/m
σ = conductivity in [mho/m] or [Siemens/m]
ρ = equivalent tissue density in g/cm
3
Note that the density is set to 1, to account for actual head tissue density rather than the density of
the tissue simulating liquid.